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New entries since:Wed Dec 31 16:00:00 1969
ID Date Author Type Categoryup Subject Text Attachments
  8935   Mon Jul 29 21:57:45 2013 gautamConfigurationendtable upgradeHardware installed at 1X9 The following hardware   
  8942   Tue Jul 30 19:40:47 2013 gautamConfigurationendtable upgradeDAC-PZT Driver Board Output Signal Chain Tested 
 [Alex, Gautam]
  
  8943   Tue Jul 30 19:44:05 2013 gautamConfigurationendtable upgradeSecond mirror glued to PZT and mounted  
 I have
  
  8967   Mon Aug 5 18:48:44 2013 gautamConfigurationendtable upgradeFull range calibration of PZT mounted mirrors for Y-endtable I
had prepared two more PZT mounted mirrors
for the Y-end some time back. These are:
 2-inch-CVI-Yawcalib.pdf2-inch-CVI-Pitchcalib.pdf1-inch-Laseroptik-Yawcalib.pdf1-inch-Laseroptik-Pitchcalib.pdf 
  9451   Mon Dec 9 11:44:08 2013 SteveUpdateendtable upgradeETMY optable got new beam dumpAluminum shield replaced by razor beam
dump.
 ETMYoptBefore.jpgETMYoptAfter.jpg 
  9941   Mon May 12 14:42:25 2014 steveUpdateendtable upgradeoptical table enclosure wall proposal and table at ETMY

    

       
            
 Hilite70.jpgETMY-ISCT.jpgRoscoThermashield.pdf 
  11591   Fri Sep 11 10:56:47 2015 SteveUpdateendtable upgradeETMY optical table feedthroughThe ETMY enclosure feedthrough - north
is installed. The sealing material is hard
to work with.
 ETMY-Nfeedt.jpg 
  11600   Tue Sep 15 16:49:08 2015 SteveUpdateendtable upgradeETMY optical table feedthroughETMY optical table enclosure feedthrough-
south is in. Now it is time to see how air
tightness increases performance.
 ETMYsFeedt.jpg 
  11608   Thu Sep 17 02:22:53 2015 SteveUpdateendtable upgradeETMY optical table feedthroughI doubt we'll see any effect until
we carefully seal the holes. If there's
1 hole in your boat it still sinks.
  
  11897   Tue Dec 22 16:39:42 2015 SteveUpdateendtable upgradeETMY optical table enclosureI think there should be a scientifically
based aveluation of the ETMY enclosure so
we can make the ETMX better.
 IMG_0028.JPGIMG_0027.JPGETMY-ISCT_EISOL.jpg 
  12029   Thu Mar 10 16:29:32 2016 gautamUpdateendtable upgradeInventory checkI did a quick sweep of the lab to find
out what hardware has already been acquired
for the X-end table upgrade. The attached
 Inventory_check.pdfDoubler_comparison.pdf 
  12030   Thu Mar 10 16:32:45 2016 ranaUpdateendtable upgradeInventory checkIts not a good idea to use green mounts
with green lasers. Steve should be able to
get another copy of the EY doubler mount
  
  12033   Mon Mar 14 22:42:23 2016 gautamUpdateendtable upgradeInventory check


  
  12051   Mon Mar 28 10:43:18 2016 SteveUpdateendtable upgradeETMX 4'x2' optical table pictures 

 
 ETMX4x2Layout.jpgETMX_4x2.JPGETMXopt_4x2.JPG 
  12056   Wed Mar 30 17:38:52 2016 gautamUpdateendtable upgradeX end table proposed layout Attachment 1: This
is a photo of the current X end table optical
layout with the beampaths of the various
 ETMX_3x2.JPGlayout_details_20160328.pdfETMX_proposed_layout.pdf 
  12057   Thu Mar 31 09:38:41 2016 SteveUpdateendtable upgradeY end 4x3 existing layoutBeam colors: 1064 nm red, 514 nm green
and 633 nm yellow.

There should be room for lens in
 ETMY4x3layout.jpg 
  12058   Thu Mar 31 19:49:31 2016 gautamUpdateendtable upgradeproposed layout v2The major changes from the previous layout:


I've depicted the Green
reflected beam path more accurately - I approximately measured
 ETMX_proposed_layout_v2.pdf 
  12060   Mon Apr 4 10:59:12 2016 gautamUpdateendtable upgradeproposed layout v3I realized I had overlooked an important
constraint in the layout, which is that the
enclosure will have two supports that occupy
 ETMX_proposed_layout_v3.pdfIR_modematch.pdfGreen_modematch.pdfXendALaMode.zipETMX_proposed_layout_dimensions.dwg 
  12061   Mon Apr 4 15:04:14 2016 gautamUpdateendtable upgradeCOMPONENT REMOVAL
I'm
planning to start removing components from
  
  12063   Tue Apr 5 11:42:17 2016 gaericqutamUpdateendtable upgradeTABLE REMOVALThere is currently no table at
the X end! 

We have moved the vast majority
  
  12065   Wed Apr 6 17:52:21 2016 gautamUpdateendtable upgradeFirst contact cleaning commencedI've begun cleaning the optics that
will eventually go back onto the newly installed
X-endtable. We decided that First Contact
  
  12066   Thu Apr 7 12:51:24 2016 gautamUpdateendtable upgradeBeam height differencesSteve has finished installing the enclosure
on the new endtable. So Eric and I decided
to try and lock the X arm and measure the
  
  12067   Thu Apr 7 14:30:58 2016 SteveUpdateendtable upgradeETMX table height 




 ETMXbrs.pngETMX.jpgIMG_0618.JPGETMX.jpgETMXwc.jpg 
  12068   Fri Apr 8 09:13:20 2016 SteveUpdateendtable upgradeETMX-T beam heightX arm resonating after alignment, beam
height on ETMX optical table ~4.75"

 
 ETMXalignedT.pngETMXF.jpg 
  12073   Wed Apr 13 00:56:07 2016 gautamUpdateendtable upgradeX endtable repopulationOver the last couple of days, I've
been working on restoring the optical layout
on the X-endtable. Some notes about the status
  
  12074   Wed Apr 13 11:00:28 2016 SteveUpdateendtable upgradeX endtable repopulationETMX optical table is grounded to ETMX
chamber through 1 Mohms

The doubling oven temp controller
  
  12075   Wed Apr 13 18:25:07 2016 gautamUpdateendtable upgradeLightwave health check[Koji,gautam]

Lightwave NPRO information:

Model: 126-1064-700
  
  12079   Fri Apr 15 18:38:12 2016 gautamUpdateendtable upgradeLightwave health check - NO IMPROVEMENTI re-measured the power levels today.

We have ~205mW out of the NPRO,
and ~190mW after the Faraday. It doesn't
  
  12083   Tue Apr 19 18:37:29 2016 gautamUpdateendtable upgradeLaser swap + optical layoutSummary of work done over the last
two days


Lightwave NPRO
 IR_modematch_19April2016_2.pdf 
  12085   Thu Apr 21 14:25:52 2016 gautamUpdateendtable upgradeGreen light recoveredI've made progress on the new layout
up to the doubling oven. After doing the
coarse alignment with the diode current to
 IMG_6567.JPGIMG_6568.JPGCVI_reflectivity.jpeg 
  12089   Tue Apr 26 15:22:35 2016 SteveUpdateendtable upgradeCleaning ETMX vacuum dirty windowGautom is progressing with the layout nicely.
The X-arm transmission window have not seen
cleaning for decades. This should be the
 ETMX-Tvp.jpgETMX-TvpDetail.jpg 
  12090   Tue Apr 26 23:19:42 2016 gautamUpdateendtable upgradeGreen aligned to arm - high order mode flashes seenAttachment #1

Layout as of today. Most of the
green path is done. The Green REFL PD + PZT
 IMG_2219.JPGIMG_2220.JPG 
  12094   Wed Apr 27 15:04:47 2016 SteveUpdateendtable upgradeCleaning ETMX vacuum dirty windowIt looks very promising.

 
 1cETMX-Tcmp.jpg 
  12095   Thu Apr 28 00:41:08 2016 gautamUpdateendtable upgrademore progress - Transmon PD installedThe IR Transmon system is almost completely
laid out, only the QPD remains to be installed.
Some notes:
  
  12099   Fri Apr 29 00:55:46 2016 gautamUpdateendtable upgradegreen PDH locked to XarmUsing the modulation frequency suggested
here,
I hooked up the PDH setup at the X-end and
  
  12100   Fri Apr 29 16:05:23 2016 gautamUpdateendtable upgradeCleaning ETMX vacuum dirty windowAfter a second round of F.C. application,
I think the window is clean enough and there
are no residual F.C. pieces anywhere near
 IMG_0755.JPG 
  12104   Mon May 2 19:14:18 2016 gautamUpdateendtable upgradeOptical layout almost completeWith Steve's help, I installed the
Oplev earlier today. I adjusted the positions
of the two lenses until I deemed the spot
 ETMX_wedge.pdf 
  12105   Thu May 5 03:05:37 2016 gautamUpdateendtable upgradeALS status update[ericQ, gautam]

Today we spent some time looking
into the PDH situation at the X end. A summary
 ALS_noiseSpec_5May2016_2.pdfCoherence_5May2016.pdfimage.jpeg 
  12108   Thu May 5 14:05:01 2016 ranaUpdateendtable upgradeALS status updateAll seems very fishy. Its not good to put
attenuators and filters in nilly-willy.


Once the post-PD bandpass
  
  12109   Thu May 5 21:28:44 2016 gautamUpdateendtable upgradeInnolight PZT capacitanceI suggested
in an earlier elog that after the repair
  
  12122   Thu May 19 16:29:20 2016 SteveUpdateendtable upgradeOptical layout almost complete 

 
 ETMX_4x3_closed.jpgsealedETMXenclosure.jpg 
  12526   Fri Sep 30 19:53:07 2016 gautamUpdateendtable upgradeX end IR pickoff fiber coupled[johannes, gautam]

Today we re-installed the fiber
coupler on the X-endtable to couple some
  
  12532   Wed Oct 5 16:28:10 2016 gautamUpdateendtable upgradeEX laser power monitor PD installedI installed a 10% BS to pick off some of
the light going to the IR fiber, and have
added a Thorlabs PDA55 PD to the EX table
  
  438   Tue Apr 22 22:19:02 2008 robMetaphysicslorejiggling sliders
In the interests of tacit communication of
scientific knowledge, I here reveal a nugget
  
  1104   Sun Nov 2 20:21:58 2008 ranaConfigurationloreHP 5550dtn (Grazia) set up on allegraI set up printing to grazia from allegra.
The CUPS interface was not as straightforward
as Tobin had made it seem in the Wiki. I
  
  1217   Thu Jan 8 16:49:37 2009 ranaConfigurationloreHP 5550dtn (Grazia) set up on allegra[quote]I set up printing to grazia from allegra.
The CUPS interface was not as straightforward
as Tobin had made it seem in the Wiki. I
  
  1579   Wed May 13 02:53:12 2009 robSummaryloreChannel Hopping: That ancient enemy (MC problems)We were stymied tonight by a problem which
began late this afternoon.  The MC would
periodically go angularly unstable, breaking
  
  1582   Wed May 13 14:43:29 2009 robSummaryloreChannel Hopping: That ancient enemy (MC problems)


   
        
            
 MC3sidemon.png 
  2138   Fri Oct 23 15:02:00 2009 robUpdateloremarconi phaseSo, it appears that one doesn't even have
to change the Marconi set frequency to alter
the phase of the output signal.  It
  
  2139   Sat Oct 24 04:57:33 2009 ranaUpdateloremarconi phase


   
        
            
  
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